{"id":37820,"date":"2020-08-01T23:59:28","date_gmt":"2020-08-01T23:59:28","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=37820"},"modified":"2020-08-04T01:44:33","modified_gmt":"2020-08-04T01:44:33","slug":"1-week-of-volcanic-cloud-emission-from-nishioshima","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/37820","title":{"rendered":"1 week of volcanic cloud emission from Nishioshima"},"content":{"rendered":"

\"Himawari-8<\/a>

Himawari-8 Ash RGB images, from 25 July to 01 August 2020 [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>JMA<\/strong><\/a> Himawari-8 Ash Red-Green-Blue (RGB) images created using Geo2Grid<\/strong><\/a> (above)<\/strong><\/em> displayed the nearly continuous volcanic cloud emanating from Nishinoshima<\/strong><\/a> during the 1-week 25 July to 01 August period (faster animations are also available: gif<\/strong><\/a> | mp4<\/strong><\/a>). Brighter shades of pink in the Ash RGB images suggest a higher concentration of ash within the volcanic cloud. The direction of plume transport switched from northwesterly\/westerly to southerly\/southeasterly during this time, which is explained by the transition in wind direction within much of the troposphere as revealed by rawinsonde data from nearby Chichijima (below)<\/strong><\/em>.<\/p>\n

\"Plots<\/a>

Plots of rawinsonde data from Chichijima [click to enlarge]<\/p><\/div>

\"VIIRS<\/a>

VIIRS True Color RGB images from NOAA-20 and Suomi NPP [click to enlarge]<\/p><\/div>After the transition to southerly transport, VIIRS True Color RGB images from NOAA-20 and Suomi NPP as visualized using RealEarth<\/strong><\/a> (above)<\/strong>, <\/em>the surface visibility at Iwo Jima RJAW dropped to 4 miles on 01 August (below)<\/strong><\/em> as the hazy volcanic plume drifted across the area.<\/p>\n

\"Time<\/a>

Time series plot of surface observation data from Iwo Jima [click to enlarge]<\/p><\/div>
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<\/p>\n
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#Nishinoshima<\/a> is continuously pumping ash into the atmosphere. Here's a CALIOP\/MODIS analysis showing the height of part of the plume (~5-6.5 km asl) & an estimate of its fine ash mass (~0.2 Tg). @airesEO<\/a> @jvernier82<\/a> @simoncarn<\/a> @CIMSS_Satellite<\/a> @ArnauFolchDuran<\/a> @DlrSo2<\/a> pic.twitter.com\/i2pbDaaPSK<\/a><\/p>\n

— Andy Prata (@andyprata) August 3, 2020<\/a><\/p><\/blockquote>\n